Calculate exact file download and upload durations across 4G, 5G, cable, and Gigabit fiber connections.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Type the file size and select MB, GB, or TB.
Compare download durations across connection speed tiers from 3 Mbps to 10 Gbps.
Copy individual or full matrix transfer estimates.
Network speeds are measured in bits (b), while file sizes are in bytes (B). 1 Byte = 8 bits, so 1 Gbps = 125 MB/s theoretical max.
Yes, a 5% TCP/IP packet framing and handshake overhead is factored into all calculations.
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